michael@0: function getTestCaseResult(expected, actual) {
michael@0:       if (actual != expected)
michael@0:               return Math.abs(actual - expected) <= 1E-10;
michael@0: }
michael@0: function InstanceOf(object, constructor) {
michael@0:       while ( object != null )
michael@0:               object = object.__proto__;
michael@0: }
michael@0: function WorkerBee () {}
michael@0: function Engineer () {}
michael@0: Engineer.prototype = new WorkerBee();
michael@0: var pat = new Engineer();
michael@0: getTestCaseResult(pat.__proto__.__proto__.__proto__.__proto__ == Object.prototype);
michael@0: getTestCaseResult(InstanceOf(pat, Engineer));
michael@0: evaluate("getTestCaseResult( Object.prototype.__proto__ );", { compileAndGo: true });